Abstract
This paper presents a novel sensitive triple-band power rectifier for RF energy harvesting systems. The proposed rectifier can simultaneously harvest RF energy from GSM-900, GSM-1800, and Wi-Fi-2450 bands at relatively low and medium ambient power densities. Previously, a few multi-band rectennas have been reached a stable conversion efficiency overall frequency bands of interest because of the nonlinearity and the distinct input impedance of the rectifying circuit at these frequencies. The originality of this paper is on the improved impedance matching technique that enhances the efficiency and performance of the rectifier. The proposed high-efficiency triple-band rectifier consists of three parallel branches. Each branch comprises an input matching circuit designed to provide maximum RF power transferred to rectifying diodes, a single voltage doubler using Schottky diode HSMS-2852, and a DC-pass filter to smooth the DC output voltage. A prototype of the proposed rectifier circuit is fabricated and tested to verify its performance against the simulation results. With an optimum load resistance of 3.8 kΩ at -10 dBm input power level, the measured RF to DC conversion efficiency achieves 33.7%, 21.8%, and 20% at 0.9, 1.8 and 2.45 GHz respectively. The efficiency is above 46.5 % overall bands of interest under 0 dBm input power.
Highlights
On one hand, wireless applications (FM, TV, GSM, WIFI, WIMAX . . . .) used by wireless communication systems such as portable entertainment systems and health care devices, are widely presented in the urban environment
Better performance can be achieved at low input power, and the optimal value of reflection coefficient is reached to be -17dB, -22dB and 31dB at 0.9, 1.8 and 2.45 GHz respectively for an input power of −20 dBm
A novel three-branches impedance matching network was designed to ensure a maximum transfer to the rectifying circuit
Summary
Wireless applications (FM, TV, GSM, WIFI, WIMAX . . . .) used by wireless communication systems such as portable entertainment systems and health care devices, are widely presented in the urban environment. A dual-band harvesting system was used in [6], the obtained rectifier efficiency was 48% and 39% for an input power level of 0 dBm at 915 MHz and 2.45 GHz, respectively.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
